Analysis of gas flow resistance
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Gas A and Gas B are both fed into a common pipeline. There is a regulating valve for each gas at the entrance to this pipeline, with the flow direction being from A to B. (The diameter of the pipe for Gas A is the same as that for Gas B, and the pressure of both gases is equal.) During operation, why is there such a large difference in the positions of these two regulating valves, given that the pressures are the same and the regulating valves are identical? Could it be that the addition of Gas B increases the resistance to the flow of Gas A? Why does this phenomenon occur? Since the pressure in the main pipe is constant, the valve settings for pressure difference control should be roughly the same. I hope fellow sailors can help analyze this from a professional perspective
What are the factors that affect gas resistance?
The flow coefficient of a control valve is related to factors such as the operating flow rate of the gas, its operating density, and the pressure difference across the valve. From your description, it seems that the operating pressure differences of the control valves are similar; however, if the operating flow rate and operating density of the gas differ, then the calculated flow coefficients will also be different, and it’s not surprising that there will be significant variations in the valve’s opening degree